GIFT  OF 
Arthur  E,   Moncaster 


DRY 


STEAM 


THE 

TRACY  STEAM 
PURIFIER. 


FOR  INSURING 


DRY  AND  CLEAN  STEAM  BEFORE  IT 
LEAVES  THE  BOILER 


Patented  in  the  United  States 
Foreign  Patents  Pending 


Catalogue  No.  10 


MANUFACTURED  BY 

THE  TRACY  ENGINEERING  CO. 

SAN  FRANCISCO 
CALIFORNIA 


T7 

THE  TRACY  ENGINEERING  COMPANY 


ev 


Copyrighted 

1915 

by 

The  Tracy  Engineering  Co. 
San  Francisco,  Cal. 


Printed  by  Taylor,  Nash  &  Taylor,  San  Francisco 


SAN   FRANCISCO,   CALIFORNIA 


INTRODUCTION 

THERE  has  never  been  a  time  in  the  history  of  hu- 
man eff ort  so  fraught  with  rapid  evolution  and  im- 
provement as  has  been  experienced  in  the  whole 
range  of  industrial  life  in  the  last  few  decades. 

Steam  engineering  has  made  great  strides  in  the  advent 
of  new  and  improved  forms  of  prime  movers,  and  has 
kept  well  abreast  with  the  advance  of  the  age  by  notable 
achievements,  with,  however,  one  notable  exception. 

As  old  as  is  the  art  of  making  steam,  and  as  long  as  the 
so-called  "dry  pipe"  for  preventing  moisture  from  leaving 
the  boiler  with  the  steam  has  been  used,  no  substantial  im- 
provement has  been  made. 

Owing,  however,  to  the  now  recognized  deficiency  of 
this  device,  much  effort  has  been  directed  toward  an  im- 
provement, with  a  result  that  various  substitutes  have  been 
brought  out  from  time  to  time;  but  from  a  careful  study 
of  the  problem,  covering  a  wide  range  of  investigation  and 
experience,  we  feel  warranted  in  saying  that  the  question 
of  efficient  separation  had  never  been  solved  before  the 
scientific  principles  embodied  in  the  Tracy  Steam  Purifier 
were  introduced. 

The  results  obtained  from  the  many  that  are  now  in 
daily  use  have  made  what  may  be  justly  called  a  new  era 


726300 


THE  TRACY   ENGINEERING   COMPANY 


in  the  science  of  separation,  so  that  the  "commercially" 
dry  steam  having  one,  two  or  three  per  cent  of  moisture  is 
no  longer  a  standard,  as  we  are  now  prepared,  by  making 
the  Purifier  to  fit  each  particular  case,  as  outlined  by  the 
purchaser,  to  actually  take  out  all  of  the  water,  together 
with  the  added  advantage  of  eliminating  all  foreign  matter 
that  may  be  entrained  or  carried  over  by  the  steam. 

The  purpose  here  is  to  bring  the  results  of  our  research 
to  the  attention  of  owners  of  boilers  who  are  desirous  of 
overcoming  the  difficulties  incident  to  wet  steam,  and  to 
that  end  we  courteously  invite  a  review  of  the  following 
pages,  which  are  devoted  to  a  description  of  how  it  is  done. 

THE  TRACY  ENGINEERING  CO. 

San  Francisco, 

February  20,  1915. 


SAN   FRANCISCO,  CALIFORNIA 


CAUSES  OF  WET  STEAM 
FROM  BOILERS 

INVESTIGATION  has  shown  that  there  are  two  entirely  differ- 
ent and  distinct  conditions  under  which  wet  steam  leaves  a 
boiler.  The  most  common  and  best  understood  one  may  be  des- 
ignated as  "priming,"  and  is  present  in  some  degree  in  any  boiler 
and  with  any  kind  of  feed  water,  while  the  other  and  less  prevalent 
form  is  called  "foaming." 

Priming  is  simply  the  atomization  of  water,  due  to  steam  emerg- 
ing from  the  surface  of  the  water  at  high  velocity.  If  the  particles 
of  water  are  heavy  enough,  they  drop  back  to  the  water  level,  but 
the  finer  spray  is  carried  along  with  the  steam,  in  proportion  to  the 
velocity  of  the  steam  in  the  drum,  while  on  its  way  to  the  outlet 
nozzle  of  the  boiler.  It  is  therefore  apparent  that  restricted  liber- 
ating surface  and  small  steam  space  contribute  to  the  degree  of 
moisture  due  to  priming. 

Foaming  is  an  entirely  different  phenomenon  and  is  caused  by 
impurities  in  the  water,  as  pure  water  can  not  foam.  Under  some 
conditions  the  foaming  may  be  so  violent  that  a  mass  of  bubbles 
fills  the  entire  steam  space  of  the  boiler. 

During  such  periods  the  steam  leaves  the  boiler,  not  as  homo- 
geneous steam,  but  in  globules  of  varying  size,  surrounded  by  an 
envelope  of  water,  the  total  amount  of  which  has  given  rise  to  the 
term  "slugs  of  water,"  and  accounts  for  the  enormous  amount  of 
water  which  leaves  the  boiler  at  such  times. 

The  degree  of  foaming  depends  upon  the  condition  of  the  water 
and  the  rate  of  firing.  At  times  the  entire  steam  space  may  be  filled 
with  these  bubbles,  even  though  elevated  steam  drums  may  be  used, 
and  this  explains  why  the  addition  of  drums  has  been  found  of  so 
little  help. 

At  other  times  the  "foam,"  or  bubbles,  may  exist  only  as  a 
layer,  or  "blanket,"  on  the  surface  of  the  water,  varying  in  depth 
according  to  conditions,  but  even  under  such  circumstances  the 


THE  TRACY   ENGINEERING  COMPANY 


steam  space  is  reduced  and  the  steam  velocity  correspondingly  in- 
creased, so  that  bubbles  are  easily  entrained  by  the  steam  emerging 
from  the  water  level,  at  high  velocity,  on  its  way  to  the  boiler 
nozzle. 

Such  mineral  matter  as  may  be  in  suspension  is  carried  over 
with  the  water,  whether  the  latter  is  in  the  form  of  spray  or  envel- 
opes (of  the  bubbles)  ;  foreign  matter  also  exists  in  the  form  of 
"  scum,"  which  is  light  enough  to  float  on  the  water,  or  even  on  the 
foam.  This  material,  when  it  reaches  the  engine,  mixes  with  and 
absorbs  the  lubricating  oil,  and  not  only  reduces  the  lubrication, 
but  is  gritty  enough  to  induce  cutting  of  valves,  cylinders,  rods  and 
packing,  clogs  the  piston  rings  of  engines,  or  fouls  the  blades  and 
reduces  the  efficiency  of  turbines. 


SEPARATION 

Moisture  Due  to  Priming 

As  previously  stated,  the  moisture  in  this  case  exists  in  more  or 
less  finely  divided  particles  of  water,  light  enough  to  be  carried 
along  by  the  current  of  steam  on  its  way  to  the  boiler  nozzle.  Since 
the  density  of  water  is  so  much  greater  than  that  of  steam,  it  has 
given  rise  to  about  all  the  various  forms  of  separators  heretofore 
on  the  market,  and  they  depend  solely  upon  the  momentum  of  the 
water  particles  for  separation. 

In  order  to  better  understand  the  philosophy  of  separation,  it  is 
well  to  consider  some  of  the  principles  involved,  and  as  separators 
intended  for  steam  pipe  lines  are  the  ones  most  generally  known,  a 
diagrammatical  form  is  shown  in  Figure  i,  wherein  the  flow  of 
steam  is  from  left  to  right. 

Of  this  general  type  there  is  a  very  great  variety,  yet  all  involv- 
ing the  same  principle,  whether  rotary,  direct  impact,  horizontal  or 
vertical.  In  nearly  all  cases  there  is  but  ONE  path  for  the  entire 
volume  of  steam,  although  some  are  divided  into  two  paths  or  ports. 


SAN   FRANCISCO,  CALIFORNIA 


Fig.  1 

Regardless  of  the  form  of  the  device,  there  are  four  factors  in- 
volved in  separation,  viz.: 

Size  of  water  particles. 

Velocity  of  steam. 

Distance  the  particles  of  water  have  to  travel  ACROSS 

the  current  of  steam. 

Immurement  of  the  assembled  particles  or  DROPS  of 
water  from  the  path  of  steam. 

All  these  factors  are  interdependent.  It  is  obvious  the  larger  the 
particles  of  water  the  more  momentum  they  will  have  and  will  force 
themselves  a  greater  distance  through  the  body  of  moving  steam. 
Other  particles  that  are  too  light  or  are  too  near  the  INNER  periph- 
ery pass  on  with  the  steam  and  fail  to  be  eliminated.  Again,  the 
higher  the  velocity  of  steam,  the  greater  the  number  and  size  of 
particles  that  will  be  swept  along  without  separation. 

With  these  fundamental  physical  laws  in  mind,  attention  is  direc- 
ted to  the  manner  in  which  the  problem  of  separation  is  met  by  the 
Tracy  Steam  Purifier. 


THE  TRACY  ENGINEERING  COMPANY 


Figure  2  shows  a  horizontal  cross-section  of  vertical  GUTTER 
baffles.  The  steam  enters  the  spaces  between  the  gutters  in  the  front 
row,  thus  dividing  the  steam  into  thin  vertical  streams.  These 
streams,  or  "ribbons,"  flow  directly  toward  the  open  side  of  the 
gutters  in  the  second  row,  where  each  ribbon  is  divided  into  two 


Fig.  2 

thinner  streams  which  make  a  right-angled  turn  in  passing  through 
the  narrow  vertical  ports  constituting  the  space  between  the  two 
rows  of  gutters.  After  passing  these  ports  the  steam  passes  on 
through  the  remaining  series  of  gutters,  in  order  to  reach  the  cen- 
tral conduit  leading  to  the  boiler  outlet. 

Instead  of  there  being  only  ONE  or  TWO  passages  through  the 
separator  large  enough  to  accommodate  the  ENTIRE  flow  of  steam, 
it  is  here  divided  into  HUNDREDS  of  THIN  streams,  so  small  that 
a  particle  of  water  has  but  a  minute  distance  to  travel  to  get  out  of 
the  path  of  the  steam  into  the  PROTECTION  of  the  gutters, 
where  there  is  NO  current. 


10 


SAN   FRANCISCO,  CALIFORNIA 


Here,  also,  not  only  is  the  steam  divided  into  many  thin  streams, 
to  reduce  the  distance  the  water  has  to  travel  to  get  out  of  the  cur- 
rent, but  instead  of  only  ONE  turn,  wherein  centrifugal  force  may 
act,  there  is  turn  after  turn  in  the  reverse  direction,  through  a  whole 
SERIES  of  gutters. 

The  aggregate  area  of  the  ports  is  several  times  that  of  the  boiler 
nozzle,  and  the  resulting  low  velocity,  together  with  the  thin 
streams,  progressive  separation  and  extremely  great  superficial 
surface  in  the  gutters,  makes  it  IMPOSSIBLE  for  even  the  finest 
particles  of  water  to  escape. 

Moisture  Due  to  Foaming 

The  preceding  analysis  dealt  with  particles  of  water  surrounded 
by  steam,  whereas  the  following  analysis  deals  with  globules  of 
STEAM  surrounded  by  WATER. 

What  a  vast  difference  this  makes  in  the  matter  of  separation 
only  those  who  have  systematically  attempted  to  handle  the  latter 
may  know. 

Most  of  the  standard  makes  of  separators  will  do  very  good 
work  in  the  first  instance,  but  extensive  investigation  leads  to  the 
conviction  that  not  one  can  by  any  possibility  handle  the  second 
case. 

As  a  matter  of  fact,  separation  is  most  needed  at  times  of  foam- 
ing, for  it  is  at  such  periods  that  the  greatest  danger  and  trouble 
occur.  As  before  stated,  foaming  is  simply  the  result  of  impurities 
in  water  under  violent  agitation,  and  is  represented  by  a  mass  of 
minute  globules  of  steam,  each  surrounded  by  a  coating  of  water. 
This  mass  rests  on  the  surface  of  the  water  in  the  boiler  and  forms 
a  blanket,  so  to  speak,  over  the  whole  area,  and  the  steam,  as  it 
emerges  from  the  water  on  its  way  to  the  outlet  nozzle,  has  to  pass 
through  this  comparatively  "feathery"  mass,  with  the  result  that 
some  of  the  globules,  or  bubbles,  with  their  coatings  are  carried 
along  with  the  steam. 


11 


THE  TRACY   ENGINEERING  COMPANY 


The  percentage  of  moisture  in  the  steam  leaving  the  boiler  may 
be  comparatively  small  if  the  foam  is  of  no  appreciable  depth,  but 
will  increase  as  the  depth  increases,  till  the  most  aggravated  state 
arrives — when  the  entire  steam  space  is  filled  with  foam. 

Nothing  is  more  manifest  than  the  impossibility  of  efficient 
separation  in  the  standard  devices  when  the  entire  device  is  filled 
with  a  HOMOGENEOUS  mass  of  these  globules — there  being  no 
chance  for  centrifugal  force  to  act  or  differential  momentum  to  take 
place.  It  is  evident,  therefore,  that  before  any  separation  can  be 
effected  the  bubbles  must  first  be£ROKEN  and  the  moisture  form- 
ing their  "skins  "be  reduced  to  a  state  of  SOLID  WATER.  In  this 
state,  and  this  only,  can  the  moisture  be  eliminated,  and  the  design 
herein  described  accomplishes  this  end. 

GENERAL  ARRANGEMENT 

To  show  how  the  gutters  are  arranged  with  reference  to  the 
conduit,  the  latter  being  the  passageway  for  the  steam  after  it  leaves 
the  gutters,  reference  is  made  to  Figure  3. 

This  cut  shows  a  vertical  transverse  section  through  the  Puri- 
fier and  illustrates  the  vertical  gutters  as  they  appear  in  the  cast- 
iron  housing. 

Steam  enters  at  each  side  (right  and  left  side  of  cut)  and  passes 
through  the  banks  of  baffles  to  the  central  conduit.  The  separated 
water  gravitates  down  the  inside  of  the  gutters  to  the  floor  of  the 
Purifier  housing,  from  which  it  falls  back  to  the  water  level  in  the 
boiler,  while  the  dry  steam  passes  out  through  the  conduit  which  is 
in  direct  communication  with  the  boiler  nozzle  as  shown  in  Figure  4. 

GUTTERS  SELF-CLEANING 

'  The  gutters  do  not  clog,  even  with  water  in  the  boiler  carrying 
several  hundred  grains  of  solid  matter  per  gallon.  The  best  evidence 
of  this  is  a  plant,  where  the  water  is  extremely  bad,  that  has  been 
using  Purifiers  for  two  years  and  the  gutters  remain  perfectly  clean. 


12 


SAN   FRANCISCO,   CALIFORNIA 


Fig.  3 


The  reason  for  this  is  that  there  can  be  no  scale  deposit,  such  as 
occurs  on  boiler-heating  surfaces,  owing  to  the  absence  of  temper- 
atures that  would  evaporate  the  moisture ;  while  any  solid  matter 
in  suspension,  or  even  any  scum  that  reaches  the  baffles,  is  washed 
off  by  the  water  itself,  there  being  enough  at  all  times  for  this 
purpose. 

INSTALLATION 

The  Purifiers  are  made  to  pass  through  a  10x15  manhole  and 
in  lengths  which  can  be  easily  handled  in  the  restricted  spaces  pre- 
vailing inside  the  boiler.  A  cast-iron  nozzle  tee,  or  elbow,  is  pro- 
vided for  attachment  to  the  main  steam  outlet  of  the  boiler,  and  the 


13 


THE  TRACY   ENGINEERING  COMPANY 


Purifier  elements  are  bolted  to  the  tee,  the  outer  element  of  the 
Purifier,  when  necessary,  being  supported  by  a  bracket. 


Fig.  4 

PURIFIERS  NEED  NO  ATTENTION 

After  the  Purifiers  are  installed  no  care  or  attention  whatever 
is  required,  as  the  water  drains  directly  to  the  boiler  automatically 
without  the  use  of  return  traps  or  pumps,  and  incidentally  without 
loss  of  heat. 

PURIFIERS  IN  CONJUNCTION  WITH 
SUPERHEATERS 

Reference  to  the  figures  in  the  following  table  shows  that  a 
superheater  capable  of  giving  150°  F.  of  superheat  when  supplied 
with  dry  steam  at  200  pounds  gauge  pressure  will  have  its  super- 
heat reduced  about  14°  F.  for  each  per  cent  of  moisture  in  the  enter- 
ing steam,  and  if  the  latter  carried  3  per  cent  of  moisture,  which  is 
within  the  limit  of  what  is  called  "commercially  dry,"  the  super- 
heat would  be  only  108°  F.,  and  would  be  entirely  eliminated  if  the 
moisture  reached  7  per  cent. 

This  reduction  in  superheat  would  cause  an  increase  in  the  steam 
consumption  of  turbines  and  engines  of  approximately  i  per  cent 
for  each  10°  reduction  in  superheat. 


14 


SAN   FRANCISCO,  CALIFORNIA 


evaporae  mo 
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S/7o«/  B.t.u.  req 
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Superhea 


Fig.  5.  Table  Showing  the 


15 


THE  TRACY  ENGINEERING  COMPANY 


Fig.  6 
Tracy  Steam  Purifier  Installed  in  a  Stirling  Boiler 

Developing  1300  B.H.P. 
Length  of  Purifier,  Over  All,  10  Feet 

It  would  seem  illogical,  therefore,  to  put  in  superheaters  enough 
larger  to  evaporate  the  several  per  cent  of  moisture  which  usually 
goes  over  with  the  steam,  in  order  to  get  the  desired  superheat, 
when  it  could  be  accomplished  with  Purifiers  at  only  a  fraction  of 
the  cost. 

Moreover,  as  practically  all  feed  water  carries  some  mineral 
salts  capable  of  leaving  a  scale  deposit  when  evaporated,  it  is  mani- 
fest that  this  deposit  must  be  left  in  the  superheater  tubes  to  the 
impairment  of  their  efficiency. 

Should,  however,  any  of  the  foreign  matter  pass  out  of  the 
tubes,  it  must,  of  necessity,  go  in  the  form  of  dust  or  flakes,  and  this 
being  readily  coagulated  with  the  oil  is  particularly  objectionable 
in  reciprocating  engines.  Nor  are  steam  turbines  immune  from  this 
source  of  trouble,  for  it  is  well  known  that  the  foreign  matter  which 
passes  out  of  the  boiler  collects  on  the  blades  to  such  an  extent 
that,  at  times,  live  steam  must  be  admitted  to  the  lower  stages  in 
order  to  maintain  the  normal  rating  of  the  machine. 

There  is  only  one  logical  cure  for  all  the  foregoing  difficulties, 
and  that  is  to  supply  the  superheater  with  CLEAN  and  DRY 
steam. 


Fig.  7 
Purifier  with  End  Outlet 


16 


SAN   FRANCISCO,  CALIFORNIA 


Fig.  8 

Purifier  Installed  in  a  16-ft.  dia.  Scotch  Marine  Boiler 
Covering  Both  Main  and  Auxiliary  Outlets 

GUARANTEES 

Ist — "When  the  boiler  is  generating  steam  at  the  rate  for  which 
the  Purifier  is  built,  or  ....  pounds  per  hour,  at  ....  pounds 
gauge  pressure,  with  the  water  level  at  the  TOP  of  the  usual 
length  of  gauge  glass,  and  no  change  from  the  regular  prac- 
tice regarding  the  amount  of  mineral  salts  and  boiler  com- 
pound in  the  water,  the  steam  leaving  the  Purifier  will  al- 
ways be  more  than  99.8  per  cent  dry  and  most  of  the  time 
it  will  be  100  per  cent  dry,  with  no  observable  drop  in  pres- 
sure." 

2d — "Of  the  mineral  held  by  the  feed  water  in  solution  or  suspen- 
sion, later  taking  the  form  of  'scum'  in  the  boiler,  NONE 
will  pass  out  with  the  steam,  the  evidence  of  said  'scum' 
being  clogged  and  broken  piston  rings,  scored  valves  and 
cylinders,  rapid  wearing  of  rod  packings  and  deposits  of 
scale  in  superheaters  and  on  turbine  blades." 

3d — "  Regardless  of  the  speed  with  which  the  engine  is  started  or 
reversed,  no  'slugs'  of  water  will  carry  over  from  the 
boiler  to  the  injury  of  piping  or  machinery." 

4th — "The  saving  in  fuel  will  exceed  2  per  cent,  due  to  conserving 
the  heat  losses  in  the  water  previously  passing  out  with  the 
steam,  and  also  to  less  cylinder  condensation.  If  the  boiler 
is  equipped  with  a  superheater,  the  saving  in  fuel  will  exceed 
3  per  cent,  due  to  increased  superheat." 

5th — "  During  a  period  of  two  years  following  shipment  we  will 
replace,  f .  o.  b.  cars,  any  parts  which  prove  defective,  pro- 
vided such  defects  are  due  to  inferior  workmanship  or  ma- 
terial." 


17 


THE  TRACY  ENGINEERING  COMPANY 


TESTS 

The  following  is  but  one  of  hundreds  of  Calorimeter  determina- 
tions made  on  the  Tracy  Steam  Purifier. 

Test  in  the  port  boiler  of  the  S.  S.  "  El  Segundo,"  owned  by  the 
Standard  Oil  Company  of  California. 

Test  No.  1 06,  en  route  from  Puget  Sound  to  San  Francisco;  en- 
gine running  at  maximum  speed — 92  r.  p.  m.  Constant  of  Calori- 
meter, i. oo  per  cent. 


Time 
2-30 

2-55 
3-00 

3-05 
3-io 

3-15 
3-20 

3-25 
3-30 
3-35 
3-40 
3-45 
3-50 


Temperature  of 
Steam 


373 
374 
374 
374 
374 
370 
370 
372 
372 
374 
374 
374 


Temperature  of 
Calorimeter 

Net  %  of 
Moisture 

.  .  .     Started 

Calorimeter 

301^ 

—.15* 

302 

—.15 

302 

—.15 

302 

—.15 

302 

—.15 

300 

—.18 

300 

—.18 

301 

—.17 

301 

—.17 

302 

—.15 

302 

—.15 

302 

—.15 

Water 
in  Glass 


full 

14" 
13" 
13" 
12" 


13 


12 
12 


*The  NEGATIVE  figures  in  column  four  are  equivalent  to  approximately  2°  F.  of  super- 
heat, and  are  probably  due  to  friction  in  that  part  of  the  main  pipe  line  between  the  calori- 
meter and  the  boiler,  as  there  is,  and  always  has  been,  a  total  drop  of  13  pounds  between  the 
boiler  and  the  CYLINDER;  however,  this  superheat  could  not  exist  unless  the  steam  was 
100  per  cent  dry  when  it  left  the  Purifier. 

OUR  OFFER 

The  Tracy  Steam  Purifier  is  correct  in  theory  and  dependable 
in  practice. 

To  those  who  would  like  dry  steam,  free  from  the  ordinary  im- 
purities, we  offer  our  Purifiers,  designed  for  their  stated  conditions, 
subject  to  a  3O-day  trial,  with  the  understanding  that  they  may 
either  return  the  apparatus  or  favor  us  with  the  stipulated  price,  as 
may  be  their  choice. 

Under  this  plan  none  have  ever  been  returned,  due  to  the  fact 

that  WE  HAVE  NEVER  HAD  A  FAILURE. 


18 


SAN   FRANCISCO,  CALIFORNIA 


Fig.  9 
Dome  Type  Purifier  with  Special  Outlet  Nozzle 

PARTIAL  LIST  OF  USERS  AND  REFERENCES 


San  Francisco,  Cal. 
San  Francisco,  Cal. 
Santa  Barbara,  Cal. 
Oakland,  Cal. 
Galveston,  Texas 
San  Pedro,  Cal. 


Standard  Oil  Company  (Marine  Dept.)  . 
Union  Oil  Company  (Marine  Dept.)  .  . 
Producers  Transportation  Company  . 
Standard  American  Dredging  Company  . 
Standard  American  Dredging  Company  . 
Standard  American  Dredging  Company  . 

Union  Ice  Company Los  Angeles,  Cal. 

C.  A.  Smith  Lumber  Company Marshfield,  Ore. 

Antioch  Dredging  Company    .     .  . Antioch,  Cal. 

Union  Iron  Works  Company San  Francisco,  Cal. 

Matson  Navigation  Company San  Francisco,  Cal. 

Inter-Island  Steam  Navigation  Company     .     .  Honolulu,  H.  I. 
California  Transportation  Company     ....  San  Francisco,  Cal. 

Oceanic  Steamship  Company San  Francisco,  Cal. 

U.  S.  Army  Transport  Service San  Francisco,  Cal. 


19 


THE  TRACY  ENGINEERING  COMPANY 


TRACY 

ENGINEERING  COMPANY 
PRODUCTS 

LIVE  STEAM  PURIFIERS 

EXHAUST  STEAM  OIL  SEPARATORS 

LOCOMOTIVE  FEED  WATER  HEATERS 

Spray  Type 

LOCOMOTIVE  FEED  WATER  HEATERS 

Eductor  Type 

SUPERHEATERS  FOR 
SCOTCH  BOILERS 

CIRCULATION  ACCELERATORS 
FOR  B.  &  W.  BOILERS 

FEED  WATER  HEATERS 

Spray  Type 


20 


THIS  BOOK  IS  DUE  ON  THE  LAST  DATE 
STAMPED  BELOW 


AN  INITIAL  FINE  OF  25  CENTS 

WILL  BE  ASSESSED  FOR  FAILURE  TO  RETURN 
THIS  BOOK  ON  THE  DATE  DUE.  THE  PENALTY 
WILL  INCREASE  TO  SO  CENTS  ON  THE  FOURTH 
DAY  AND  TO  $1.OO  ON  THE  SEVENTH  DAY 
OVERDUE. 


NOV    5     1933 

NOV6    llll 

36  'id44 

LD  21-100m-7,'33 

Makers 
Stockton,  Calif. 

PAT.  JAN.  21.  1908 


726300 


UNIVERSITY  OF  CALIFORNIA  UBRARY 


